Grinding-machine for glassware.



No. 731,230. PATENTED JUNB'IB, 190.3.

E. G. SGHRADER.

GRINDING MACHINE FOR GLASSWARB APPLICATION rum) NOV. 22, 1901.

no MODEL. I a sums-sum z,

WP- U PATENTED JUNE 16, 1903'. I

E. G. SGHRADER. GRINDING MACHINE FOR GLASSWARE.

APPLICATION FILED NOV. 22, 1901.

3 SHEETS-SHEET 3 N0 MODEL.

I, V I l 60:15,:

No. 731,230. Patented June 16, 1903.

UNITED vSTNrEs PATENT OF IC ERNEST C. SOHR-ADER, OF PITTSBURG, PENNSYLVANIA, ASSIGNOR OF ONE-v HALF TO HARRY O. WOOD, OF TOLEDO, OHIO.

GRINDING-MACHINE FOR GLASSWARE.

SPECIFICATION forming part of Letters Patent N 0. 731,230, dated June 16, 1903.

Application filed November 22, 1901. Serial No. 83,260. (No model.)

To all whom it may concern: rotary work-carrier A and a rotary grinder Be itknown that I, ERNEST O. SCHRADER, a B, arranged in axial alinement with each citizen of the United States, residing at Pittsother. The grinder is preferably in the form burg, in the county of Allegheny and State of Of a disk-wheel mounted upon a vertical ar- 55 Pennsylvania, have invented certain new and her 0, which is journaled in bearings D upon useful Improvements in Grinding-Machines the'frame. The carrier A preferably comfor Glassware, of which the following isla prises a disk or rotary head of substantially specification, reference being had thereinto the same as the maximum diameter of the the accompanying drawings. grinder-wheel and having secured thereto a 60 The invention relates to machines for grindseries of radially-extending work-holders of ing articles of glassware, and more particu the following construction. larly to that class employed for grinding and a is a socketed holder or chuck adapted to trimming the edges of blown-glass articles receive the work, which in the drawings is after they have been cracked off from the represented as a tumbler. b is a spindle 65 blank. upon which said chuck is mounted, which is Among the objects of the invention are, journaled in bearings 0 upon an arm (1. The first, to render the operation more nearly aulatter is secured to and projects radially from tomatic, so as to dispense with the necessity the margin of the carrier-head and in one poof skill on thepart of the attendant; second, sition is adapted to hold the edge of the glass 7c to diminish the breakage of work incidental in contact with the periphery of the grinder. to the operation of the machine; third, to pre- In order to permit of readily placing and reserve the grinding-Wheel by grinding equally moving the work from the holder a, the arm upon all portions of its periphery, to dispense d is adapted to be swung into an upright powith the necessity of axial movement of the 'sition, and to this end is preferably connect- 75 grinding-wheel, and to provide adjustments ed to the carrier by a hinge e.

by means of which the machine may be read- E is a track secured to the frame below the ily adapted for different kinds of work. arm at, and F is a wheel or roll upon the arm The invention consists in the peculiar cond, running upon said track and adapted to struction of a machine comprising a rotary support said arm. The track E is variable 80 3o grinder and means for causing the work to in elevation and is of such a shape that at travel therearound while being operated one point the arm cl is permitted to drop into upon; further, in the means employed for a substantially vertical position, thereby limiting the pressure of the work against the holding the socket so that the work may be grinding-surface, so as to reduce breakage; readily dropped therein. From this point the 8 further, in the peculiar construction of mechtrack ascends until the arm at is swung upanism for causing the travel of the work and ward slightly beyond the horizontal, as shown for feeding it into and out of contact with on the left in Fig. l, for the purpose of givthe'grinder, and, further, in the peculiar coning a bevel to the edge of the glass. struction, arrangement, and combination of For the greater part of thedistance around 90 0 parts, as more fully hereinafter described and the track E is of a height to hold the edge of claimed. the glass in the holder in contact with the pe- In the drawings, Figure 1 is a vertical cenriphery of the grinders. The track is not, tral section through the machine. Fig. 2 is however, level or parallel to the plane of roa plan view of the rotary work-carrier. Fig. tation of the grinder, but is inclined, so as to 5 3 is a front elevation thereof. Fig. 4 is a diacause the work to travel across the entire pegram of the mechanism for feeding the work riphery of the grinder during its travel thereacross the grinder. Fig. 5 is a longitudinal around.

section through one of the chucks and spin- The track-wheel F in addition to its funcdles, showing the manner of disengaging the tion of supporting the arm also serves to im- Ieo 5 part rotary motion to the holder. As shown,

Upon a suitable framework is mounted a the drive connection between the wheel and holder comprises a shaft f, upon which the roll is mounted, a sprocket g thereon, and a. chain h, connecting said sprocket with a corresponding sprocket i on the spindle Z). The spindle b has a longitudinal movement in its bearings between the collars j and k, and G is a spring sleeved upon the spindle between the outer bearing and the sprocket 2', which serves to yieldingly press the work against the grinder.

To permit of adjustment to various sizes of work, as well as to take up the wear in the grinding-wheel, the holders a and their bearings are preferably longitudinally adjustable upon the arms d. As shown, this adjustment is made by attaching the bearings c to a plate 0, which is secured to the arm at by a bolt Z passing through a slotted bearing, permitting oflongitudinal adjustment. The bevel of the edge ground may be changed by raising or lowering the track E, which to this end is supported upon adjusting-screws m, passing through lugs n on the frame. The grindingwheel is also preferably vertically adjustable, and, as shown, this adjustment is made by providing a screw-threaded collar H upon the bearing D, which may be raised or lowered by turning. This collar supports the collar I on the arbor, and to reduce friction balls are preferably interposed.

The rotary carrier A has a shank J, which is journaled in a bearing K on the frame, and motion is imparted to this shank through a worm-gear L, meshing with a worm M on a horizontal shaft N.

For disengaging the work from the sockets of the holders a the spindle b is preferably hollow and has a sliding shank 0 therein, which at its inner end bears against the bottom of the work.

0 is a fixed cam adapted to strike against the shank 0 when the arm dis in its upright position and cause it to lift the work in its socket, so that the attendant may remove it.

The construction of parts being as described, in operation motion is imparted to the carrier A from the shaft N through the worm -gear connection L and M. At the same time the arbor O and grinder B are rapidly revolved by a suitable drive connection. (Not shown.) The attendant then places the tumblers or other work successively in the holders alas the arms d pass the front of the machine and are in upright position. The wheels F will then mount the incline of the track E and throw the upper edge of the work into contact with the periphery of the grindenagainst which it is then held by the uniform tension of the spring G until the circuit of the grinder is completed and the arm is again dropped into an upright position. During the travel around the grinder the contacting edge of the glass will be moved across the periphery of the wheel in the manner and for the purpose before described. Just before the starting-point is again reached the shank 0 will strike against the cam O and disengage the work from the holder, so that'it may be removed and replaced by an unground glass.

With a machine constructed as above de scribed the wear of the grinding-wheel will be very uniform, both on account of the uniform pressure of the work thereon and because of the travel of the work across the periphery of the wheel. Should it be necessary to provide additional means for keeping the periphery even, a truing device, such as P, may be arranged between the points where the work enters and leaves contact with the grinder. Y

What I claim as my invention is 1. In a machine for grinding glassware, the

combination with a rotary grinder having a fixed plane of rotation, of a holder for the work in contact with the periphery of said grinder, and means for causing said holder to travel around said grinder in a path at an angle to the plane of rotation whereby said work is fed across the peripheral grindingsurface.

2. In a machine for grinding glassware, the combination with a grinder having a fixed plane of rotation, of a holder for the work in contact with the periphery of said grinder, a carrier upon which said holder is mounted revoluble about the axis of said grinder and a track upon which said carrier is supported inclined to the plane of rotation of said grinder.

3. In amachine for grinding glassware, the combination with a rotary grinder, of carrier revoluble around said grinder, a rotary chuck for holdingthe work in contact with the grind ing-surface, movable upon said carrier, a track-wheel for supporting said carrier having a drive connection with said chuck, and a track upon -which said wheel travels.

4. In a machine for grinding glassware, the combination with a rotary grinder, of a carrier revoluble around said grinder, a rotary chuck for holding the work in contact with the peripheral surface of said grinder, a trackwheel for supporting said carrier having a drive connection with said chuck, and a track over which said wheel travels arranged at an angle to the plane of rotation of said grinder whereby the work is fed across the periphery thereof and is simultaneously rotated.

5. In a machine for grinding glassware, the combination with a rotary grinder, of a rotary work-holder adapted to revolve the edge of the work in contact with the periphery of said grinder, a carrier for said holder adapted to revolve about said grinder, and an arm hinged to said carrier upon which said holder is mounted the angle of said arm being adapted to be adjusted to alter the bevel at which the edge of the work is ground.

6. In a machine for grinding glassware, the combination with a rotary grinder, of a rotary holder adapted to revolve the edge of the work in contact with said grinder, a carrier revolving about the axis of said grinder, an

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a track around which said wheel travels, vertically adjustable to alter the inclination of said arm.

7. In a machine for grinding glassware, the

combination with a rotary grinder, of a rotary work-holder, a carrier upon which said holder is mounted revoluble around said grinder,and means automatically operated by the rotation of said carrier for moving said rotary workholder from a position adapted to receive the work into a position for holding the work in contact with the grinding-surface.

8. In a machine for grinding glassware, the combination with a rotary grinder, of a rotary holder havinga socketfor receiving the work, a head revoluble around the axis of said grinder, an arm hinged to said head to swing in a vertical plane, and having said rotary holder mounted therein, and a track for supporting said arm, a portion of said track being depressed to permit said holder to assume an upright position for receiving the work and said track then inclining upward to swing said arm into a position where the work is in contact with the grinding-surface.

9. In a grinding-machine for glassware, the combination with a rotary grinder and a rotary work-holder, the latter having its axis in the same plane with but at an angle to the axis of the former, and a mechanical feeding device for automatically moving the work in "said holder into contact with the periphery ERNEST C. SCHRADER.

Witnesses:

JOHN SENDELBACH, ALBERT G. WALTER. 

